Bimmer Plug

PSM Style 4-Piece Carbon Fiber Diffuser w/ Carbon Undertray - BMW F80 M3 | F82 / F83 M4


Arguably the most aggressive-looking 4 piece performance diffuser available today. We suggest investing in a pack of neck braces to hand out to anyone who happens to look at your M. This aggressive style diffuser calls for attention with its angular edges and bold fins. Our diffuser is constructed 100% with genuine real carbon fiber featuring a 2x2 weave and a deep gloss finish.

All of our products are coated with UV protectant clear coat to prevent from fading. This part is handmade to ensure fitment all around with the highest quality material.

Professional installation is recommended however it is a straightforward process. The Performance diffuser will undoubtedly add a sport and aggressive look to your F8X M, distinguishing your ride from the crowd.

It is a 4 piece real carbon fiber diffuser & includes the undertray. Please select whether you would like to include a brake light on the diffuser or not.

  • Fits: 2015-2019 F80 BMW M3 & 2015-2020 F82 BMW M4
  • Made 100% with & from genuine real carbon fiber; V1 features our carbon fiber design.
  • 2x2 Carbon Fiber Weave
  • High Gloss Clear Coat with UV Protection
  • Quality and Fitment Guarantee
  • Ships from the USA
Our goal is to get parts into your hands as soon as possible. Most carbon fiber and performance parts ship via UPS, FedEx, and DHL. The majority of smaller parts (i.e. carbon fiber mirror caps) ship via USPS. All of our packages are insured and if your order value is over $200 we may require a signature. Once you've placed your order you will receive a confirmation email that your order is being processed. Please allow 4-7 business days for processing and the tracking to update on our site. Some of our products are custom made and will require an extended processing time, up to 2 weeks. Please feel free to contact us for any inquiries regarding shipping.

We have a 30-day return policy, which means you have 30 days after receiving your item to request a return. 

To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase. Returns are only eligible on a rare occasion if you received the wrong/damaged item from what you ordered.

To start a return, you can contact us at If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted. 

You can always contact us for any return question at


Damages and issues 
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.


The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.

We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.

Customer Reviews

No reviews yet

Curated for you.